Fig. 5

A Citric acid and glyoxylate cycle pathway. Red indicates the annotated genes with significant differences up-regulated under Pi deficiency, green indicates down-regulated expression, and blue represents the coexistence of up- and down-regulated annotated genes; B Thermograms of citric acid and glyoxylate cycle pathway related Unigene under different phosphorus treatments. The color bar indicates the expression levels [represented as log2 (RPKM means)]; red indicates high expression level, blue indicates low expression level, and white indicates RPKM = 0; C Expression analysis of differentially expressed genes in citric acid and glyoxylate cycle pathway of the Chinese fir roots under different phosphorus concentrations (high Pi supply - HP, Pi deficiency - LP and Pi starvation -NP) for 3 and 30 days. The experiments were repeated three times on three biological replicates of each treatment (n = 3). Values are means ± SD. Bars followed by different letter(s) indicate significant difference at P < 0.01